Free Coordination and Control MCQs with Answers

• A. Opsin and retinol
• B. Retinol and retinene
• C. Guanosine and retinol
• D. Opsin and retinal

Explanation: The rods contain a photosensitive pigment called rhodopsin.Rhodopsin is composed of opsin and retinene.The opsin is a protein and is…

• A. Tectorial membrane
• B. Organ of corti
• C. Cochlea
• D. Vestibular apparatus

Explanation: Vestibular apparatus is present in the ear. It forms the labyrinth of the inner ear in association with the cochlea.

• A. C-­Aqueous chamber - ­Reflects the light which does not pass through the lens
• B. D- Choroid ­- Its anterior part forms the ciliary body
• C. A - Retina - Contains photoreceptors i.e.rods and cones.
• D. B-Blind spot - ­Has only a few rods and cones.

Explanation: In the given figure, A is the retina which is the innermost layer, containing photoreceptors rods and cones. B is the blind spot.

• A. A­-Action potential, C­-Neurotransmitter
• B. B­-Neurotransmitter, D­-Receptor capsules
• C. C-­Receptor, D-­Synaptic vesicles
• D. A­-Axon terminal, B­-Serotonin complex

Explanation: A-Action potential B-Neurotransmitter C-Receptor D-Synaptic vesicles

• A. C­-Mid brain, D-­Cerebellum
• B. A-­Cerebrum, C-­Pons
• C. B­-Corpus callosum, D-­Medulla
• D. A­-Cerebral hemispheres, B-­Cerebellum

Explanation: A-Cerebral hemisphereB-ThalamusC-Pons varoliiD-Cerebellum

• A. Spinal cord
• B. Corpus collosum
• C. Cerebellum
• D. Hypothalamus

Explanation: The brain is the anterior-most part of the central nervous system. The human brain can be divided into three parts: forebrain, midbrain…

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: Hypothalamus is the region of the forebrain in the floor of the third ventricle, linked with the thalamus above and the pituitary gland…

• A. It is composed of enucleated cells
• B. It is a non­living layer
• C. Its cells are least penetrable by bacteria
• D. It has no blood supply

Explanation: The cornea is a transparent portion that forms the anterior one-sixth of the eyeball.

• A. K+ ions from intracellular fluid to the extracellular fluid
• B. Na+ ions from extracellular fluid to intracellular fluid
• C. K+ ions from extracellular fluid to extracellular fluid
• D. Na+ ions from intracellular fluid to extracellular fluid

Explanation: An action potential is a change in electrical potential that occurs across a plasma membrane during the passage of a nerve impulse.

• A. D - Sensory hai cells A - EndolymphB - Tectorial membrane
• B. A - Perilymph B - Tectorial membrane C - Endolymph
• C. B - Tectorial membrane C - Perilymph D - secretory cells
• D. C - Endolymph D - Sensory hair cells A - Serum

Explanation: A - Perilymph B - Tectorial membrane C - Endolymph D - Sensory hair cells

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: Rod cell is a type of light sensitive receptor cell present in the retina of vertebrates.

• A. First positive then negative and continues to be negative
• B. First negative then positive and continues to be positive
• C. First positive then negative and again back to positive
• D. First negative then positive and again back to negative

Explanation: A nerve is a strand of tissue comprising many nerve fibres plus supporting tissue enclosed in a connective tissue sheath.

• A. Anterior pituitary
• B. Female reproductive system of the cockroach
• C. Olfactory epithelium of our nose
• D. Proximal end of uriniferous tubules

Explanation: The bowman's gland, also called the olfactory gland is any of the branched tubuloalveolar glands situated in the mucous membrane of the…

• A. Cortisone
• B. Acetylcholine
• C. Epinephrine
• D. Norepinephrine

Explanation: Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a neuron and another cell.

• A. Acetylcholine
• B. Norepinephrine
• C. Dopamine
• D. GABA

Explanation: Parkinsonism is caused by degenerations of neurons in the Substantia nigra tract which are essentially dopaminergic.

• A. Cell metabolites
• B. Fat granules
• C. Ribosomes
• D. Mitochondria

Explanation: The cell body of a nerve cell contains basophilic granules called Nissl's granules.

• A. Accomodation
• B. Adaptation
• C. Mutation
• D. Photoperiodism

Explanation: The rod cells of the eyes contain a purplish pigment called visual purple, or rhodopsin. They function in dim light and at night.

• A. It is secreted by the conjuctiva and glandular layer.
• B. It is a lacrimal gland which secretes tears.
• C. Blood circulation is absent in cornea.
• D. In old age it becomes the cause of cataract.

Explanation: The cornea forms the anterior one-sixth of the fibrous coat. It is transparent, circular and fully visible from in front.

• A. Vagus nerve
• B. Trigeminal nerve
• C. Facial nerve
• D. None of these

Explanation: The trigeminal nerve is the largest 5th cranial nerve. It has 3 branches - (i) Ophthalmic, a sensory branch from the skin of the nose…

• A. Secretion of digestive juices
• B. Increased heart rate
• C. Secretion of saliva
• D. All of these.

Explanation: The sympathetic nervous system is a component of the autonomic nervous system consisting of a pair of sympathetic trunks, preganglionic…